Then it is probably driver issue, update OpenBSD to latest stable and try again ...

Upgrading from -release to -stable isn't going to provide driver changes since the -stable branch is merely meant to provide a simpler path to install patches & security fixes. See Section 5.1 of the FAQ for more information:

Upgrading from -release to -stable isn't going to provide driver changes since the -stable branch is merely meant to provide a simpler path to install patches & security fixes. See Section 5.1 of the FAQ for more information:

I will give you the same advice I gave leanardz here. If you are sure you have the appropriate files in /etc/firmware, you can report your trouble to the OpenBSD project. Follow ocicat's link in that thread for advice on how to report a problem.